Ballast Brook and Beaufort Formations (late Tertiary) on Northern Banks Island, Arctic Canada

Fyles, J G; Hills, L. V.; Matthews, John V.; Barendregt, René W.; Baker, J.; Irving, E.; Jetté, Hélène

doi:10.1016/1040-6182(94)90010-8

Cited by 67 publications

(67 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LF 3is assigned to the Pliocene Beaufort Formation (Bft Fm). The occurrence of unaltered wood (mostly conifers) and organics, associated with horizontally-bedded and cross-bedded sand and gravel are characteristic of the BFt Fm and are consistent with other exposures described across Banks Island (Fyles et al, 1994) and elsewhere in the CAA (Tozer, 1956;Craig and Fyles, 1960).…”

Section: Sedimentologysupporting

confidence: 54%

Glaciotectonic deformation and reinterpretation of the Worth Point stratigraphic sequence: Banks Island, NT, Canada

Vaughan

England

Evans

2014

Quaternary Science Reviews

View full text Add to dashboard Cite

. (2014) 'Glaciotectonic deformation and reinterpretation of the Worth Point stratigraphic sequence : Banks Island, NT, Canada.', Quaternary science reviews., 91 . pp. 124-145.Further information on publisher's website:http://dx.doi.org/10.1016/j.quascirev. 2013.11.005 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Quaternary Science Reviews. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Quaternary Science Reviews, 91, 1 May 2014, 10.1016/j.quascirev.2013 Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Hill-hole pairs, comprising an ice-pushed hill and associated source depression, cluster in a belt along the west coast of Banks Island, NT. Ongoing coastal erosion at Worth Point, southwest Banks Island, has exposed a section (6 km long and w30 m high) through an ice-pushed hill that was transported w 2 km from a corresponding source depression to the southeast. The exposed stratigraphic sequence is polydeformed and comprises folded and faulted rafts of Early Cretaceous and Late Tertiary bedrock, a prominent organic raft, Quaternary glacial sediments, and buried glacial ice. Three distinct structural domains can be identified within the stratigraphic sequence that represent proximal to distal deformation in an ice-marginal setting. Complex thrust sequences, interfering foldsets, brecciated bedrock and widespread shear structures superimposed on this ice-marginally deformed sequence record subsequent deformation in a subglacial shear zone. Analysis of crosscutting relationships within the stratigraphic sequence combined with OSL dating indicate that the Worth Point hill-hole pair was deformed during two separate glaciotectonic events. Firstly, ice sheet advance constructed the hill-hole pair and glaciotectonized the strata ice-marginally, producing a proximal to distal deformation sequence. A glacioisostatically forced marine transgression resulted in extensive reworking of the strata and the deposition of a glaciomarine diamict. A readvance during this initial stage redeformed the strata in a subglacial shear zone, overprinting complex deformation structures and depositing a glaciotectonite w20 m thick. Outwash channels that incise the subglacially deformed strata...

show abstract

Section: Sedimentologysupporting

confidence: 54%

Glaciotectonic deformation and reinterpretation of the Worth Point stratigraphic sequence: Banks Island, NT, Canada

Vaughan

England

Evans

2014

Quaternary Science Reviews

View full text Add to dashboard Cite

show abstract

“…Island (e.g., Fyles, 1990;Fyles et al, 1994). The proximity of a glacier is highlighted by the preservation 336 of striae on individual clasts, especially in the very coarse, lower gravel.…”

Section: I) Description 170mentioning

confidence: 99%

Quaternary geology of the Duck Hawk Bluffs, southwest Banks Island, Arctic Canada: a re-investigation of a critical terrestrial type locality for glacial and interglacial events bordering the Arctic Ocean

Evans

England

Farge

et al. 2014

Quaternary Science Reviews

View full text Add to dashboard Cite

. (2014) 'Quaternary geology of the Duck Hawk Blus, southwest Banks Island, Arctic Canada : a re-investigation of a critical terrestrial type locality for glacial and interglacial events bordering the Arctic Ocean.', Quaternary science reviews., 91 . pp. 82-123. Further information on publisher's website:http://dx.doi.org/10.1016/j.quascirev.2014.03.011Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Quaternary science reviews. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Quaternary science reviews, 91, 2014, 10.1016/j.quascirev.2014.03.011 Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Laurentide Ice Sheet deposited outwash that extended to deglacial marine limit (11 m asl) along the 37 west coast of Banks Island. Our new stratigraphic synthesis fundamentally revises and simplifies the 38 record of past Quaternary environments preserved on southwest Banks Island, which serves as a key 39 terrestrial archive for palaeoenvironmental change. 40

show abstract

“…The Beaufort Formation extends along the western margin of the CAA from Banks Island northward to Meighen Island (Fig. 1), and as originally defined, excludes possible time-equivalent "high-terrace" deposits on Ellesmere Island and elsewhere (Fyles, 1990;Fyles et al, 1994). It is beyond the scope of this manuscript to determine whether the Beaufort Formation should be redefined to include the latter sediments.…”

Section: Geological Settingmentioning

confidence: 99%

“…Fossil forest remains are known from Mesozoic to early and late Cenozoic deposits across the Arctic (Francis, 1988;Greenwood and Basinger, 1993;Fyles et al, 1994;Matthews and Fyles, 2000;Falcon-Lang et al, 2004). Most of the known late Neogene sites were discovered by John Fyles (Geological Survey of Canada) through a series of surveys across the Canadian Arctic Archipelago (CAA) that began in the 1960s and continued into the early 1990s.…”

Section: Introductionmentioning

confidence: 99%

Stratigraphic and Paleoenvironmental Reconstruction of a Mid-Pliocene Fossil Site in the High Arctic (Ellesmere Island, Nunavut): Evidence of an Ancient Peatland with Beaver Activity + Online Appendix Figures S1 and S2 (See Article Tools)

Mitchell¹,

Rybczynski²,

Schröder-Adams³

et al. 2016

ARCTIC

View full text Add to dashboard Cite

ABSTRACT. Neogene terrestrial deposits of sand and gravel with preserved wood and peat accumulations occur in many areas of the High Arctic. The Pliocene-aged Beaver Pond fossil site (Ellesmere Island, NU) is one such site that differs from other sites in the great thickness of its peat layer and the presence of a rich vertebrate faunal assemblage, along with numerous beaver-cut sticks. Although the site has been the subject of intense paleontological investigations for over two decades, there has not been a reconstruction of its depositional history. In this study, measured sections within and surrounding the site established the stratigraphy and lateral continuity of the stratigraphic units. Grain size analysis, loss on ignition, and fossil diatom assemblages were examined to reconstruct paleoenvironmental changes in the sequence. The base of the section was interpreted as a floodplain system. Using modern peat accumulation rates, the maximum thickness (240 cm) of the overlying peat layer is estimated to represent 49 000 ± 12 000 years. From this evidence, we suggest that during the peat formation interval, beaver activity may have played a role in creating an open water environment. The peat unit was overlain by sand, rich in organic matter and charcoal, suggesting environmental change and fire occurrence.

show abstract

Ballast Brook and Beaufort Formations (late Tertiary) on Northern Banks Island, Arctic Canada

Cited by 67 publications

References 27 publications

Glaciotectonic deformation and reinterpretation of the Worth Point stratigraphic sequence: Banks Island, NT, Canada

Glaciotectonic deformation and reinterpretation of the Worth Point stratigraphic sequence: Banks Island, NT, Canada

Quaternary geology of the Duck Hawk Bluffs, southwest Banks Island, Arctic Canada: a re-investigation of a critical terrestrial type locality for glacial and interglacial events bordering the Arctic Ocean

Stratigraphic and Paleoenvironmental Reconstruction of a Mid-Pliocene Fossil Site in the High Arctic (Ellesmere Island, Nunavut): Evidence of an Ancient Peatland with Beaver Activity + Online Appendix Figures S1 and S2 (See Article Tools)

Contact Info

Product

Resources

About